How to do date conversion in Golang

Golang is a programming language for writing high-performance web applications. Dealing with dates and times is a common problem when developing web applications. Golang provides a very convenient date and time processing package, making it very easy to handle dates and times in applications. This article will introduce how to perform date conversion in Golang.

Golang has a built-in type called Time, which represents a date and time. In Golang, you can use the time.Now() function to get the current date and time. When converting dates and times to strings or formatting dates and times, you need to use the Time.Format() function. The following are some commonly used date and time formats (referenced from Golang official documentation):

• Mon Jan 2 15:04:05 MST 2006
• 2006-01-02T15:04: 05Z07:00
• 2006-01-02T15:04:05.999999999Z07:00
• 01/02/06
• 01/02/2006
• 15 :04:05
• 15:04:05.999999
• 15:04:05.999999999
• Jan 2 15:04:05
• Jan 2, 2006 at 3:04pm (MST)
• Jan _2 15:04:05
• Jan _2, 2006 at 3:04pm (MST)

The first format Is used to format date and time, this is a special string. For example, the following is an example of converting time to a string:

package main

import (
    "fmt"
    "time"
)

func main() {
    t := time.Now()
    fmt.Println(t.Format("2006-01-02 15:04:05"))
}

The above code will output a string representation of the current time in the format of "2006-01-02 15:04:05". Among them, the order and type of numbers and separators are very important. To convert the date to a different format, simply change the format string. For example, the following format string will convert the time to "15:04:05" format:

fmt.Println(t.Format("15:04:05"))

In addition to using the format string to convert the date to a string, Golang can also use time.Parse() Function converts a string to a date. The following is an example of converting a date string to a Time type:

package main

import (
    "fmt"
    "time"
)

func main() {
    layout := "2006-01-02 15:04:05"
    str := "2021-05-01 12:30:45"
    t, err := time.Parse(layout, str)
    if err != nil {
        fmt.Println(err)
        return
    }
    fmt.Println(t)
}

In the above example, the layout variable specifies the format of the date string, which is used to illustrate the content of the date string. The str variable is the date string to be converted. The time.Parse() function converts a string to Time type.

This article introduces how to perform date conversion in Golang. Whether it is converting date to string or string to date, Golang provides an easy way. Golang's date and time processing package is very flexible and can meet most date and time processing needs in applications.

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